Abstracts submitted by Werner Curdt
SUMER observations of redshifted emission at footpoints of coronal loops
I.E. Dammasch[1], B.N. Dwivedi[2,3], W. Curdt[2], S. Parenti[1]
[1] ROB Brussels, Belgium
[2] MPS Katlenburg-Lindau, Germany
[3] Department of Applied Physics, Institute of Technology, Banaras Hindu University, Varanasi-221005, India.
The ubiqitious coronal loops are dynamic magnetic structures in the solar atmosphere. Their physics holds the key to understanding the coronal heating and the flow of mass and energy in the region. However, the energy source, structure maintenance and mass balance in coronal loops are not yet fully understood. Observations of blue and redshifted emissions have been widely used in the construction of viable loop models. But observations and interpretations of line shifts have been widely debated. In this paper, we will present detailed SUMER observations which clearly show a steady downflow in both footpoints of coronal loops in all the emission lines, emanating from the chromosphere, transition region and the lower corona. We will present their interpretations and implications in the light of a viable coronal loop model. |
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